HB52R329E22-F Datasheet, PDF(27/66 Page) Elpida Memory – 256 MB Registered SDRAM DIMM 32-Mword × 72-bit, 100 MHz Memory Bus, 2-Bank Module (36 pcs of 16 M × 4 Components) PC100 SDRAM

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

HB52R329E22-F Datasheet, PDF (27/66 Pages) Elpida Memory – 256 MB Registered SDRAM DIMM 32-Mword × 72-bit, 100 MHz Memory Bus, 2-Bank Module (36 pcs of 16 M × 4 Components) PC100 SDRAM

◁

HB52R329E22-F

Function Truth Table

The following table shows the operations that are performed when each command is issued in each mode of the

SDRAM module. The following table assumes that CKE is high.

Current state

Precharge

Idle

Row active

S RE CE W Address Command

Operation

HÃ

DESL

NOP

BST

Enter IDLE after tRP

NOP

BA, CA, A10 READ/READ A ILLEGAL*4

BA, CA, A10 WRIT/WRIT A ILLEGAL*4

H H BA, RA

ACTV

ILLEGAL*4

H L BA, A10

PRE, PALL

NOP*6

HÃ

REF, SELF

ILLEGAL

MODE

MRS

ILLEGAL

HÃ

DESL

NOP

BST

NOP

BA, CA, A10 READ/READ A ILLEGAL*5

BA, CA, A10 WRIT/WRIT A ILLEGAL*5

H H BA, RA

ACTV

Bank and row active

H L BA, A10

PRE, PALL

NOP

HÃ

REF, SELF

Refresh

MODE

MRS

Mode register set

HÃ

DESL

NOP

BST

NOP

L H L H BA, CA, A10 READ/READ A Begin read

L H L L BA, CA, A10 WRIT/WRIT A Begin write

H H BA, RA

ACTV

Other bank active

ILLEGAL on same bank*3

H L BA, A10

PRE, PALL

Precharge

HÃ

REF, SELF

ILLEGAL

MODE

MRS

ILLEGAL

Data Sheet No. E0112H10

▷